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Fix redisplay loop in last change.

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(IT_POS_VALID_AFTER_MOVE_P): New macro.
(move_it_vertically_backward, move_it_by_lines): Use it.
This commit is contained in:
Kim F. Storm 2005-07-15 11:32:15 +00:00
parent a8613adf06
commit 367d949f19
1 changed files with 13 additions and 4 deletions
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17
src/xdisp.c
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@ -5873,6 +5873,15 @@ next_element_from_composition (it)
Moving an iterator without producing glyphs
***********************************************************************/
/* Check if iterator is at a position corresponding to a valid buffer
position after some move_it_ call. */
#define IT_POS_VALID_AFTER_MOVE_P(it) \
((it)->method == GET_FROM_STRING \
? IT_STRING_CHARPOS (*it) == 0 \
: 1)
/* Move iterator IT to a specified buffer or X position within one
line on the display without producing glyphs.
@ -6386,7 +6395,7 @@ move_it_vertically_backward (it, dy)
move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1,
MOVE_TO_POS | MOVE_TO_VPOS);
}
while (it2.method != GET_FROM_BUFFER);
while (!IT_POS_VALID_AFTER_MOVE_P (&it2));
xassert (IT_CHARPOS (*it) >= BEGV);
it3 = it2;
@ -6586,7 +6595,7 @@ move_it_by_lines (it, dvpos, need_y_p)
else if (dvpos > 0)
{
move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS);
if (it->method != GET_FROM_BUFFER)
if (!IT_POS_VALID_AFTER_MOVE_P (it))
move_it_to (it, IT_CHARPOS (*it) + 1, -1, -1, -1, MOVE_TO_POS);
}
else
@ -6608,13 +6617,13 @@ move_it_by_lines (it, dvpos, need_y_p)
reseat (it, it->current.pos, 1);
/* Move further back if we end up in a string or an image. */
while (it->method != GET_FROM_BUFFER)
while (!IT_POS_VALID_AFTER_MOVE_P (it))
{
/* First try to move to start of display line. */
dvpos += it->vpos;
move_it_vertically_backward (it, 0);
dvpos -= it->vpos;
if (it->method == GET_FROM_BUFFER)
if (IT_POS_VALID_AFTER_MOVE_P (it))
break;
/* If start of line is still in string or image,
move further back. */